The Protectors: A Hero's Heart (Book 1: Growth; An A:TLA Fanfiction)

Water... Earth... Fire... and Air. Those are the four elements needed for the Avatar to master.

Long ago, the four nations lived together in harmony. Then, everything changed when the Fire Nation attacked. Only the Avatar, master of all four elements, could stop them, but when the world needed him most, he vanished.

A few years after Avatar Roku's death, there came the first set of Protectors. The Protectors are people who bring balance to the world whenever the Avatar disappears or is still reincarnating. When the Avatar returns, they are allowed to help him whenever he needs it. But besides a few people, no one knows they exist.

One day, a teenage girl, her younger brother and their best friends train to become a new group of Protectors. But what are their goals in becoming Protectors? Who inspired them? Does the Avatar know they exist? Or perhaps... someone else?

A/N: May contain Zuko x OC moments.